18416840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{331}}^1$

素因数の和:462

約数の個数: 64

約数和(自身を含む): 45178560

約数和(自身を除く): 26761720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 107, 130, 214, 260, 331, 428, 520, 535, 662, 856, 1070, 1324, 1391, 1655, 2140, 2648, 2782, 3310, 4280, 4303, 5564, 6620, 6955, 8606, 11128, 13240, 13910, 17212, 21515, 27820, 34424, 35417, 43030, 55640, 70834, 86060, 141668, 172120, 177085, 283336, 354170, 460421, 708340, 920842, 1416680, 1841684, 2302105, 3683368, 4604210, 9208420, 18416840]

約数ペア:

[(1, 18416840), (2, 9208420), (4, 4604210), (5, 3683368), (8, 2302105), (10, 1841684), (13, 1416680), (20, 920842), (26, 708340), (40, 460421), (52, 354170), (65, 283336), (104, 177085), (107, 172120), (130, 141668), (214, 86060), (260, 70834), (331, 55640), (428, 43030), (520, 35417), (535, 34424), (662, 27820), (856, 21515), (1070, 17212), (1324, 13910), (1391, 13240), (1655, 11128), (2140, 8606), (2648, 6955), (2782, 6620), (3310, 5564), (4280, 4303)]